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US 12,725,602 B2Granted
Active noise reduction device, active noise reduction system and active noise reduction method
AssigneePanasonic Automotive Systems Co., Ltd.
InventorMitsuhiro Tani
Life of this patent
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Abstract
An active noise reduction device includes a signal processor that generates a cancelling signal for outputting a cancelling sound for reducing noise in an interior of a vehicle and a communicator that receives a change request for changing a parameter set related to generation of the cancelling signal to a user-designated parameter set that is designated by a user, and the signal processor generates the cancelling signal by using the user-designated parameter set based on the change request received.
Claims12
An active noise reduction device, comprising:
- a signal processor that generates a cancelling signal for outputting a cancelling sound for reducing noise in an interior of a moving body device, by applying an adaptive filter to a reference signal having a correlation with the noise, the adaptive filter having a coefficient that is updated based on an error signal indicating a state of the noise when the cancelling sound is being outputted;
- and
- a communicator that receives a change request for changing a parameter set related to generation of the cancelling signal to a user-designated parameter set that is designated by a user, wherein
- the signal processor generates the cancelling signal by using the user-designated parameter set based on the change request received,
- the signal processor determines whether an anomaly is present or absent based on at least one of the coefficient of the adaptive filter, an update amount of the coefficient of the adaptive filter, or a signal level of the cancelling signal,
- the signal processor outputs information indicating a determination result when the signal processor determines that the anomaly is present, and
- while the cancelling signal is generated by using the user-designated parameter set, the signal processor changes a determination criterion for determining whether the anomaly is present or absent to increase a likelihood of determining that the anomaly is present.
4 more elements
An active noise reduction method that is executed by a computer, the active noise reduction method comprising:
- generating a cancelling signal for outputting a cancelling sound for reducing noise in an interior of a moving body device, by applying an adaptive filter to a reference signal having a correlation with the noise, the adaptive filter having a coefficient that is updated based on an error signal indicating a state of the noise when the cancelling sound is being outputted;
- receiving a change request for changing a parameter set related to the generating of the cancelling signal to a user-designated parameter set that is designated by a user;
- generating the cancelling signal by using the user-designated parameter set based on the change request received;
- determining whether an anomaly is present or absent based on at least one of the coefficient of the adaptive filter, an update amount of the coefficient of the adaptive filter, or a signal level of the cancelling signal;
- outputting information indicating a determination result when the anomaly is determined to be present;
- and
- while the cancelling signal is generated by using the user-designated parameter set, changing a determination criterion for the determining of whether the anomaly is present or absent to increase a likelihood of determining that the anomaly is present.
4 more elements
An active noise reduction device, comprising:
- a processor;
- and
- a memory including a program that, when executed by the processor, causes the processor to:
- generate a cancelling signal for outputting a cancelling sound for reducing noise in an interior of a moving body device, by applying an adaptive filter to a reference signal having a correlation with the noise, the adaptive filter having a coefficient that is updated based on an error signal indicating a state of the noise when the cancelling sound is being outputted;
- receive a change request for changing a parameter set related to generation of the cancelling signal to a user-designated parameter set that is designated by a user;
- generate the cancelling signal by using the user-designated parameter set based on the change request;
- determine whether an anomaly is present or absent based on at least one of the coefficient of the adaptive filter, an update amount of the coefficient of the adaptive filter, or a signal level of the cancelling signal;
- output information indicating a determination result when the anomaly is present;
- and
- while the cancelling signal is generated by using the user-designated parameter set, change a determination criterion for determining whether the anomaly is present or absent to increase a likelihood of determining that the anomaly is present.
7 more elements
Dependencies are inferred from the claim text.